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    Question

    The mean proportion of 324 and 225

    is:
    A 240 Correct Answer Incorrect Answer
    B 300 Correct Answer Incorrect Answer
    C 320 Correct Answer Incorrect Answer
    D 270 Correct Answer Incorrect Answer

    Solution

    Mean proportion of two numbers 'a' and 'b' = √(ab)
    Therefore, required mean proportion = √(324 X 225) = 18 X 15 = 270

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